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Nov. 13, 1928. Re. 17,131

o. s. cAEsAR HEATING APPARATUS Fon AuToMoTIvE VEHICLES Original` Filed Feb. '7, 192'7 I 2 Sheets-Shet 1 i ,L-maga s e B" m-Q- No'v. 13, 192s. Re. 17,131

o. s. clues/1Ry HEATING APPARATUS FOB` AUTOMOTIVE vVEHICLES 2 Sheets-Sheet 2 IN vE/v TbR DH1/ALE .51 CAESAR ATTORNEYS [Ramal Nov. 13, 192s.

l, R; 17,1`31- UNITED s'rAfTEs'rATENr oFFlcE.

camu s. cansan, or t-c:`1n :aoo' ,l mamon, manon/'ro' :morro-mn, nrconroum, or Lis, immerge, a conronanon or nnLawm.

mme arrana'rus ron arr'rono'rrvn vnmcnns. i

origini la. usano, aired any 1, lesa-sum 36.166344, mea rem-nary 7, isa?.

' reime xlell August '28,' 1928. Serial No. $01,865.

This invention relates to new and useful improvements in apparatus for heating the interiors of automotive vehicles such, for instance, as sedans and buses, and an object of 5 the invention is to provide such an apparatus y com rising a heating member having a con-v nection with the water-circulating system of the vehicle engine whereby ,hot Water will be circulated through the member, means'be l ing provided in connection with the heating member for forcing the air within the vehicle body therethrough to heat it and to keep such heated air in continuous circulation withinlthe vehicle body. l

vide an air-heating member adapted to be mounted within a vehicle body and having'a connection with the water-circulating system of the engine and, further. having means yfor ldiverting substantially all or a portion of the water through the heating member to heat the interior of the vehicle body. y A further object is to provide such an apparatus including an air-heating'member comprising a plurality of horizontally disposed, spaced tubes, each ada ted to be surrounded by water, said member aving means for connecting it to the water-circulating system of an internal combustion engine, whereby a circulation "of hot water may be established therethrough, a valve being interppsed in the .connection `between the intake and discharge conduits of the heating member whereby the flow of water through the heating membermay be controlled. l A- further object is to provide 4a combination hot water and air-'heating apparatus for automotive vehicles, comprising a heat-radiating member having an electrically operated 40' fan mounted adjacent thereto for circulating the air within the vehicle body through the heating member, and means such as a rheostat for controlling thesspeed of the motor-drivenfan whereby the circulation f heatedair within the vehicle body may be controlled independently of the vehicle engine.

A further object is to provide a hot water heating member, comprising a plurality of l l .horizontally disposed tubes arranged in j spaced parallelrelation, whereby Water-circulating passages will be provided between the'tubes and each 'tube will be completely surrounded `by water, thus .providing a heat-- A further object of the. inventionv is to pro-l Application 'for member which 4will (pickly heat the air circulated through the t by the action of the fan or blowerA means mounted adjacent to the heating member. y

A further object .is to provide a heating r apparatus for automotive vehicles of simple and inexpensive construction, comprising few parts, and, which may readily and quickly be installed in a vehicle and-connected to the` .usual water-circulating system thereof, in a comparatively short period of time without the necessity of having to vmake numerous alterationsto the 'usual connections or fittings of the vehicle engine.`

Other objects ofthe invention will appear l from the following` description and accom.-

panying drawings ,andthe novel features `will e pointed out in the' annexed claims.

In the drawings there has been disclosed a structure designed to carryI out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown, as various changesv may bemade l within the scope of the claims which follow;

In the accompanying drawings forming ,heating member; j

4 Figure 5' isan enlarged detailed sectional view of the fitting adapted to be interposed in the connection between the engine waterjacket and the water-cooling radiator for dilgrti'ng water through the air-heating mem- Figure 6is a detailed sectional view on the line' 6 6 of Figure 5; and

Figure 7 lis a wiring diagram showing the v means provided in the motor circuit for controllingthe'speed of the'blower fan.

In the .selected embodiment' of the inven.

tion here shown, forpurposes of disclosure, thereis' illustrated a portion of an automotive vehicle comrising the usual engine 11, water-cooling ra iator 12 and the connection l13 connecting the/water-jacket of the engine with the radiator 12,

' The novel heating apparatus featured in this invention is best shown in Figures 1 and y 2, and comprises an air-heating member the usual dash 14 of the vehicle beneath the ada ted to be suitably mountedor secured wit in the vehicle body, as, for instance, to

instrument board 15, as shown in Figure 1. The air-heating member comprises a lurality of horizontally disposed tubes 16 aving their ends suitably secured together, as shown at 17 in Figure 6. A water chamber 18 is provided in the lower portion of the`heatingmember andhas anoutlet pipe 19 connected therewith. A similar Water chamber `"21 is provided in the upper 'portion of the heating member and has'an intake pipe 22 similarly connected therewith. The chambers 18 and 21 communicate with the water circulating passages between the tubes 16 so that when water is circulated through the heating member, all of the tubes will be completely surrounded by hot water. The outer walls of the water chambers 18 land 21 are formed by an annular 4platevor wall 23 arranged to encircle all ofthe tubes, and to rovide a casing therefor. Frames 24 an 25 are clamped to the casing 23 of the heating member to provide a reinforcement therefor and to present a finished and neat appearance. The annular 'frames 24 and 25 are secured to the casing 23 by means of tiebolts 26, passing through apertured ears 27 and 28 provided res ctlvely -in the frames 2,4 and 25, and each aving one end passing through a plate 29 adapted to be seated against the dash-board 14 of the vehicle. The inner ends of the tie-bolts 26 pass through a ertures provided in the dash 14 and havefwashers and nuts mounted thereon for securing the heating member to the dash 14. Spacing sleeves 31 are mounted upon the upper tie-bolts 26 to space the plate 29 from the inner frame 25. The inner ends of the discharge and intake pipes 19 and 22 pass through suitable apertures provided in the dash 14. 'i

`A fitting 32 is interposed in the connectiony 13 between the engine water-jacket and the radiator 12. I This fitting is provided with tubular extensions`33 and 34. preferably ary ranged at one side of the fitting as shown in Figures 5 and 6. Conduits 3G and 35, preferably flexible, connect the pipes 19and` 22 respectively with the extensions 33 and 34,- as shown in Figure 1. A valve 36, preferably of the butterfly type. is mounted in the fitting 32 between the tubular extensions 33 and 34. Thisvalve'36 is operable from the exterior of the ttingby means of a shaft or rod 37 shown in Figure 6. By means of this valve, substantially all or a portion of the wat-er flowing fromthe engine water-jacket to the radiator 12, may be `diverted 'through the heating member for heating the interior of the vehicle body. s

Means are provided. for establishing a forced circulation of heated air within the vehicle body.v Such means consists of a fan 38 mounted back of the heating member bctiveen the tubes 16 andthe plate 29, and is operable by a small motor 39 mounted upon a s ider or frame 41 'carried'by the lower tiebo t's 26, as shown in Figures 1 and 2. The motor 39, is electrically connected by conductors 42 and 43 to a suitable source of electrical energy such as the Stora battery 44 of the vehicle. L( See Figure 7. A small rheostat 45, of ordinary construction is connected in series with the conductor 43 and provides ,means for controlling the speed of the motordriven fan 38. This rheostat is preferablyI mounted u on the instrument board of the vehicle so that it may be conveniently mani pulated by the driver to control the circulation of heated air within the vehicle body. .This rheostat has been found very useful in actual practice'as it provides a positive means for controlling the heating of the interior of the vehicle, regardless of the temperature of the water circulating through the heating member. This will readily be seen when it is understood that the heating of the interior of vthe vehicle body is governed largely by the circulation of the heated air therein, as forl instance, whenthe fan is operating at high speed, the air within the vehicle body will be rapidly circulated through theheater, thus heating it to a comparative high temperature, while, on the other hand, when the fan is inoperative, the circulation of the air within the vehicle body will beV practically at zero; By the employmenttof the fan- 38 to forcibly circulate the air through the heating member. the latter-may be lmade relatively small and compact in size without jeopardizingits heatingefliciency. This is an importantfactor, as the heater will require verylittle spacein the vehicle as compared to the amount of space l usually required. by' automobile heaters of ordinary construction. Also, as a result of its compactness, practically no heat will be dissipated from the heater when the fan 38 is inoperative. The rheostat.. therefore, has been found an important adJunct in connection with the above described heating apparatus.

By heating the 'interior lof thevehicle body,

as above described. the usual danger ofmonoxlde gas entenngthe vehicle, as when using Avarious forms of heaters now in common use,

is eliminated.v The foul or gaseous air usually found beneath the engine hood is also excluded from theinterior of the vehicle body, it being understood that the air .heated and circulated within the yvehicle body is that conned therein only, or that which enters misi through cracks or crevices in the vehicle or through doors land windows, when thellatter are opened and closed. y

An 1m rtant feature'of the invention resides in t e generalconstruction of the heating member and the air-circulating means which, it will be noted-by reference 'to Figllo ure 2, are assembled 'as a unit. By thus assembling as a unit the heating member vand the blower and fan, the installation of the.' lheater in the vehicle is greatly simplified.

The construction of the heating member is such that `Aeach tube 1,6V is completely surrounded by water so that the air, blown or circulated throu h the tubes by thefan 38, will be quickly cated to a relatively high tem rature in passing therethrough. It has n found from actual practice, that by lengthening the tubes 16, the velocity or circulation of the airtherethrough for a given water temperature may be decreased without decreasing the effective heating of the interior of the `vehicle, as a result of the increased length of lthe tubes subjecting the 'eliminating any danger of the motor 39'being overloade when operating to circulate the air Within the vehicle body to maintain a i comfortable temperature therein on an cxtremely cold day. l

The valve 36within the fitting 32, provides means whereby the flow of water through the heating-member. may be cont-rolled orregulated at will. It has been' found, however, that by varying .the speed of the motor fan 38, the temperature within the vehicle body may be regulated to the desired v degree without having to manipulatev the water-controlvalve 36.

It is apparent that by cutting oii the flow of the engine water circulating system, from the hot-water air-heater, say, by' means of the valve 36, and operating the fan 38 by the motor 39 air will be circulated throughout the vehicle body at a rate depending on the speed of rotation of the' fan under control of the rheostat of the electric motor so as to cool or lower the temperature of the air within the vehicle body without obnoxious fumes entering from the chamber which contains the engine'. p

I clannas my lnventxon:

driven vehicles comprising an en inecirculating-liquid cooling system inclu ing an engine cooling-medium jacket and radiator, a valve positioned between the engine coollngmedium jacket and radiator for controlling the iiowof the cooling-medium from the to prevent passage o noxious ases and Ifumes air-heater and an engine-containing lchamber V gine' cooling-medium jacket and radiator, a 1. A hot-liquid heatmg vsystem for motorjacket to the radiator and its return, a liquidheated air-heater positioned within the body of. the vehicle and in communication with the engine circulating liquid-,cooling s stem,

means disposed between the -liquideatedy air-heaterand an en ine-containingchamber from the engine-containing c amber into the space containing the liquid-heated air-heater,

and 4a fan within the s ace containing the 1i uid-heated air-heater or circulating heat- ,el air within the vehicle body.

2. A.hot-liquid heating system for motordriven ,vehicles comprising an engine circulating liquid-cooling system including an cngine cooling-medium jacket. and radiator, a

valve positioned between the engine c'ooling-` medium jacket and radiator for controlling the fiow of the cooling-medium .from 'the jacket to the radiator and its return, a li uid- I..

heated air-heater positioned within the 'ody of the .vehlcle and in communication with the engine circulating li uid-cooling system,

means dis osed between t e liquid-heated airheater an an engine-containing chamberto prevent passage of noxious ases and fumes from the engine containing c amber into the space containing the liquld-heated air-heater, a fan Within the spacecontaining the liquid heated air-heater 4for'circulating heated air within the vehicle body, and fan regulatmg means to control the circulation of heated air within the body' `,of the vehicle.

A hot-liquid heating system for motordriven'vehicles comprising-an enUine circulating liiuid-cooling system including an engine coo ing-medium jacket and radiator, a valve positionedbetween the engine coolmgmedium jacket and Aradiator for controlling the How 'of the cooling-medium from the jacket'to the radiator and its return, a liquidheated air-heater positioned within the body of the vehicle and in communication with the engine circulating-liquid cooling system means disposed betweenl Vthe liquid-heated to prevent passage of nor'ious gases and fumes from the engine-containing,chamber into the space containing the liquid-heated air-heater, an electric motor-.driven fan to circulate hea-ted air within the vehicle body, and means for regulating the speed ofl the motor to ,controlthe circulationof air within the body of the vehicle.

4. A hot-liquid heating System for motordrlven vehicles comprlslngan engine circulating liquid-cooling system'including an eny vent passage of noxious .the engine-containing chamberinto thel y tween said unit and an latiiig liquid-cooling system, and an electric motor operated fan,ginstallcd inthe body of' the vehicle, and means disposed between said unit and an engine-containingchamber to pre- `gases and fumes from space wherein is installed said air-heater and airdistributing unit.

5. A hot-liquid heating system :for motordriven vehicles comprising an engine circulating liquid-cooling system including an engine cooling-li uidl jacket and radiator, a liquid-heated air-heater and air distributor unit comprising a liquid-heated air-heater element in communication with the.I engine circulating liquid-cooling system and provided with air-circulating tubes tobe encompassed by the liquid in theelement, an electric motor operated fan for passing air through the tubes,said unity comprisingthe air-heater and air-circulator being installedin thc body ofthe vehicle, means disposed be engine-containing chamber to prevent passage of noxious gases and lfumes from the engine-containing chamber into the'space in'wliich is installed the liquid-heated air-heater and air distributer unit,` and means for diverting substantial] all the circulating medium of the engine coo ing system to the liot-liquidair-heater unit. 6. A heating system -for motor-driven vehicles, comprising an engine cooling system including air heating and distributing unit em 'dying a liquid receiving chamber in communication With the engine cooling system to f orm in conjunction with l lation of liquid between said receiving chamber and engine cooling s ste'm, said receiving chamber being traversedY by air passageways for heating air traveling through the passageways by heated liquid received'from the engine cooling system, and a variable-speed fan positioned in relatively close relation to the liquid receiving chamber for causing a more or less frequent recirculation of air through theliquid receiving chamber and the interior of the vehicle tobe heated for effecting con` trolled variations of temperature within the interior of the vehicle, said liquid receiving radiator for a circulating chamberand fan being located within the interior of the vehicle and isolated from ex`- liaust gases and fumes generated by the en-4 gine of the vehicle.

7 A heating system for motor-driven vehicles. comprising an engine coolingjsystem including an inter-communicating jacket and air heating and distributing unit em dying a liquid receiving chamber in communication with the engine cooling system to fo'rm `in conjunction with said system a circuit for circulation of liquid between said receii-'ing chamber and engine coolingy system, said rean inter-communicating-jacket and radiator for a circulating cooling li uid, anA

said systemacircuit for circu-f o f the vehicle and embod gine cooling system to 'form cooling li uid, an.

ceivingv chamber being traversed by air passageways for heating air travelin through the passageways by heated liqui `received from the engine cooling system, and. a fan positioned in relativelg'eclose relation to the i uid receiving cham r for causing a circu ation of air through the liquidY receiving chamber and the interior of the vehicle to be heated, lsaid liquid receivinglchamber 'and fan being located within the interior of the vehicle and isolated from exhaust gases and fumes generated by the engine of the vehicle.

lationv of air through the liquid receiving chamber andthe interioi` ofthe vehicle to be heated, said liquid receivin chamber bein located within the interior o the vehicle and isolated from .exhaust gases, and fumes gen'- erated by the engine of the vehicle and being spaced from the front wall of the vehicle body and said fan being located-between, said liquid receiving chamber and said front wall of the vehicle body. i 4 9. A heating system for motor-driven ve,- hicles, comprising an engine cooling system including an inter-communicating jacket and radiator for a circulating cooling liquid, anair heatino` andvdi'stributing unit located to heat and ist-ribute air through the interior a liquid receiv# ing chamber in commiinication with theen- -in conjunction with said system a circuit for circulation of liquid-between said receiving chamber and engine cooling system, said receiving chamber being traversed by air passageways for heating air traveling through the passage- 'ways by heated liquid received fro'mtlie engine cooling system,

and means for causing a forced circulation of air through said passagewaysfin the liquid receiving chamber and the interior cf the vehicle to be heated, `said'liquid receiving-chamberand a ii forcv,ing means being isolated :I Froin'exhaustv gases SII - liquid receiving chamber for causing'a circu- 1 heating and distributing unit located within the vehicle body and in communication with the engine cooling system to form in conj unction with said system a circuit for circulation of liquid betweenl said unit and engine cooling System, said heating unit being traversed by air passageways for heating air traveling through the passageways by heated liquid received from the engine cooling system, means for causing a forced circulation of air in contact With the air heating unit and through the interior of the vehicle to be heated said air heating unit and air forcing means being isolated from exhaust gases and fumes generated by the engine of the vehicle.

ll. A heating system for motor-driven vehicles, comprising an 'engine cooling system including an inter-communicating jacket and radiatorA for a circulating cooling liquid, an air heating and distributing unit embodying a liquid receiving chamber in communication with the engine cooling system to forni in conjunction with said system a circuitfor circulation of liquid between said receiving chamber and engine cooling system, said receiving chamber being traversed by air passageways for heating air traveling through the passageways by heated liquid received from the enginey cooling system, and means' for causing a forced circulation of air through said passageW-ays in the li uid receiving chamber and the interior lof t e vehicle to be'heated, said liquid receiving chamber being located Within the interior oi the vehicle and said chamber and air forcing means being isolated from exhaust gases and fumes generated by the engine of the vehicle.

l2. A heating system for motor driven ve hicles comprising an engine cooling system including an inter-communicating engine' jacket and radiator for a circulating cooling liquid, and an air heating and distributing unit in communication With and forming a part of a branch of the liquid circuit of the engine cooling system, said air heating and distributing unit being formed for the'passage therethrough of air and of heated liquid from the engine cooling system in heat exchange relation to each other, means for creating forced circulation of air in contact with said air heating and distributing unit, said unit and said means for creating forced air circulation being located within the interior of the vehicle and isolated from exhaust gases and fumes generated. from the engine of means for producing a flow of the cooling medium from the jacket to'the radiator and its return, a liquid heated air heater positioned within thebody of thev vehicle and in commu- \nication with the engine circulating liquid cooling system, means disposed between the liquid heated air heater and an engine containing chamber to pre-vent passage of noxious gases'and fumes from the engine-containing chamber into the space containing the liquid-heated air-heater and aA fan Within the space containing the liquid-heated air-heater for circulating air in contact with said air` heater and Within the vehicle body. f

In witness'whereof, I have hereunto set my hand this 15th day oflAugust, 1.928.

ORVILLE S. CAESAR. 

